Update README.md

README.md

@@ -17,9 +17,9 @@ For more information, please see the [tutorial and reference](http://dmaccarthy.
 
 # Installation
 
-Latest release (2.2a4):
+Latest release (2.2b0):
 ```
-pip3 install sc8pr==2.2a4
+pip3 install sc8pr==2.2b0
 ```
 
 Bug fixes for v2.1:
@@ -32,7 +32,7 @@ Development version (2.2.x):
 pip3 install https://github.com/dmaccarthy/sc8pr/archive/master.zip
 ```
 
-Please note that currently (2021 October 6), **pygame 1.9** is available on [PyPI.org](https://pypi.org/project/pygame/) up to Python 3.8 only. Attempting to install an older version of **sc8pr** in Python 3.9 may fail as the **pygame** requirement is unavailable. For Python 3.9, you can use the most recent **sc8pr** versions (2.1.4, 2.2.a4) that accept **pygame 2.0** OR **1.9** as a requirement.
+Please note that currently (2021 October 6), **pygame 1.9** is available on [PyPI.org](https://pypi.org/project/pygame/) up to Python 3.8 only. Attempting to install an older version of **sc8pr** in Python 3.9 may fail as the **pygame** requirement is unavailable. For Python 3.9, you can use the most recent **sc8pr** versions (2.1.4, 2.2.b0) that accept **pygame 2.0** OR **1.9** as a requirement.
 
 See the documentation for more [detailed instructions](https://dmaccarthy.github.io/sc8pr/?inst).